How is Cray YMP hardware structure arranged such as: 
1. Its instruction set (including data types, addressing
modes/formats, high-level language and operating system support,
support for procedure calling, task switching, etc.)
2. Its CPU resources (including register set, functional units,
internal buses, etc.); control unit organization/implementation;
external bus structure
3. Its instruction fetch and execution cycles and timing (including
details of pipelining, if applicable);